Back support for vehicle seats



FIG. 1 is a top, front and left perspective view of a back support forvehicle seats showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines in the figures illustrate portions of the back support

for vehicle seats that form no part of the claimed design.

CLAIM The ornamental design for a back support for vehicle seats, asshown and described.